echo $identifier_azAZ09
echo $Identifier_azAZ09
echo $_identifier_azAZ09
echo $0
echo $1
echo $2
echo $3
echo $4
echo $5
echo $6
echo $7
echo $8
echo $9
echo $@
echo $*
echo $-

echo ${identifier_azAZ09}
echo ${Identifier_azAZ09}
echo ${_identifier_azAZ09}
echo ${identifier_azAZ09}a
echo ${Identifier_azAZ09}a
echo ${_identifier_azAZ09}a
echo ${identifier_azAZ09}"a"
echo ${Identifier_azAZ09}"a"
echo ${_identifier_azAZ09}"a"
echo ${identifier_azAZ09}"/a"
echo ${Identifier_azAZ09}"/a"
echo ${_identifier_azAZ09}"/a"
echo ${identifier_azAZ09}${identifier_azAZ09}
echo ${Identifier_azAZ09}${Identifier_azAZ09}
echo ${_identifier_azAZ09}${_identifier_azAZ09}
echo ${0}
echo ${1}
echo ${2}
echo ${3}
echo ${4}
echo ${5}
echo ${6}
echo ${7}
echo ${8}
echo ${9}
echo ${1}0
echo ${10}
echo ${@}
echo ${-}

echo ${array[0]}
echo ${array[@]}
echo ${array[*]}
echo ${subst##*/}
echo ${subst#*/}
echo ${subst%/*}
echo ${subst%%/*}

echo "${identifier_azAZ09}"
echo "${Identifier_azAZ09}"
echo "${_identifier_azAZ09}"
